Cylinder lap



April 5, 1932. A, J. BRICKNER CYLINDER LAP Filed June 18, 1928 i 25 ings, 1H which, i

,A partsin the Y 4'0 V.In the construction a verticalspndle 1 1s Patented Apr. 5; 1932 UNIT E; sfrATss PATENT* oFF-lcs ARTHURQJ. BRIcKNnafoF iJIU'sKneoN HEIGHTS; MICHIGAN,` ,nssreNos-ro :BnIoKNER-- Knorr MACHINE ooMrANngoF MusKEGoN HEIGHTS. MICHIGAN, A CORPORATION Y 0F MICHIGAN Application filed June I18,

This inventiony relates vto* cylinderV lapping 'tool particularly designed for, lapping and honing .the inner wallsof cylinders. It; is an object and purpose of thefpresentlinvention to provide a ytool, of the character stated whichl may be operated withina cylinder so as :to `remove the necessarilyy smallV amount of metal from the cylinder walls required to properly receive a pistontobe fitted therein, and to finish the walls smoothly, evenlyand J uniformly, ,the tool being providedf-with easily operated means for spreading'the parts which engage against the inner walls of the cylinder whenever it is desirableor neces sary for the ,purpose of bringing theV tool intoengagement with the `cylinder walls or for removing a greater amount i of `material from said J walls. The invention consists in a novel organization for ,attaining theA ends stated, as well `Easothers Inot at this. time specifically enumerated', but whichf-will apr pear-when `understanding isf had Vof .the inf vention from the `following,descriptiontaken `in oonnectionf-withrthe acompanyingydraw- Fig. `1y is l.a longitudinal' vertical section through the cylinder lap of .fmyinvention Y LFig; 2is ahorizontal'section substantially ,n onthezplane of line2-,-2 of Fig. 1.

`0 f Fig."3 is a similar horizontal sectiongsubstantiallyon the planeof line .3--3 of, Figi, illustrating .the tool, asglocatedwithin a' cylinderalso shown iin'ghorizontal sectionand o e Y Fig.. 4 is a section similar to `that-shown wherein` the sameL tool is used; with a smallerI diameter of cylinf n conjunction der.. ,f i Y e 1Like r referencejbharacters Y' refer i to like different figures of the drawings.

- providedwhich'may be connected withany suitable drivingshaft. rlhe upper 'fend-or yshank of the spindle ,is solid.v Aj distance Ybe-k low its :upper-end it fis provided with an eX' l 45 -teriorly tlireaded'sectionQ which, preferably,

-isl .threaded.",withA a yleft-hand threadp at the lower endof I hiohxisaan.outwardly extendingr annular collar` 3. lThespindle below the collar ,Y y l 3 is ofvuniform diameter, as Vindicated to 1 at-4,1iunti its lower endis re ohed where'it 1sA CYLINDER LAP:

plane and directlybelowthe collar 3. From thelower. end ofthe spindle tok and nearlyk throu-ghtheA threaded rsectionv 2 thereof a cylindrical openingG is'bored or .otherwise provided-.and diametrically opposed slots 7 are ycut through the sides ofthe threaded sect1on-2from the outer side thereof -tothefinner opening 6, as shown.y Also the lower section 41 of thespindle,substantially midway between `its ends, has a plurality of 'spaced apart Y openings 8 made through its sides whichlpreferably lie in the same horizontal plane, .the purpose of which will later appear."

Betweenrthelower ends and the upper collar 3 apluralityof'lapcarryingy members 9 arelpivotally ymounted to turn about -vertioal axesyeachof'said membershavinga section 10 lextending from the pivoted end portion 9 atan obtuse-angle thereto and'fterminating at its :free edge ina Hpgl1, as shown. The

pluralityof lap-carrying members substantoits-lower :endfy as indicated` yat 12, the ends ofglthe thickened portionA being undercut to make:dovetailedl guides 13E at-both the upper and lower ends of the thickened portions .12.'

able screws 14 threaded therethrough and havingpins y1405 at `their ends which are ref y Bof/the sections 1071A is thickenedl-a shortf.distancebelowitsupperI end and nearly The 1 lap carrying membersare pivotally Y mounted to turn about vertical axes between vtheears 5 .andthe collar 3 by means of suitceived in-suitablesockets in the ends of the f members 9L On the outer face of each ofthe sections 10 a lap member 15fof any .suitable materialis .adapted v,to'be'detachably carried.

The membery 15 .may beV of steel,` iron, brass orof stone of different degrees of hardness. Itis "cut awayat its inner side leaving dove# tailed'guiding.portions 16 at each end adaptedvto slideunderfthe dovetailed guides' 13 until an edge-of the lap member 15 comes againstv r a lip 11V on the lapcarryingmember. The

outer :surfaces vof the members l'are rof curved y.form having a radius of curvature somewhatW less than the radius of curvature of the cylinder in which the tool is to be used. A horizontal pin 17 is permanent-ly secured to each of the lap carrying members at the inner side of the section thereof, and passes through an opening 8 into the opening 6 made lengthwise of the lower end portion of the spindle.

A cylindrical rod 18 is mounted in the opening 6 in the spindle for free movement lengthwise thereof, at its lower end having a downwardly tapered or conical shaped head, as indicated at 19, against which the inner ends of the pins 17 bear. A rod 2() passes horizontally through the slots 7. A nut 21 is threaded onto the threaded section 2 of the spindle and has a continuous annular groove 22 at its inner side into which the ends of the rod extend. It is evident that by turning the nut 21 so as to move it back and forth on the threaded section 2 of the spindle the cylindrical rod 18 may be raised or lowered and the distance that the lap carrying members are moved outwardly away from the spindle portion 4 governed in this manner.

The lapping tool described may be introduced into a cylinder 23 with the outer surfaces of the lapping members 15 substantially in contact with the inner walls of the cylinder. Rotation of the tool in a clockwise direction (referring to Fig. 3) and with an operation of the nut 21 so as to move the members 15 farther outward, brings their outer surfaces against the inner walls of the cylinder to properly machine the same and hone the inner walls of said cylinder, removing small amounts of material unt-il the exact desired size is reached. It is apparent7 of course, with this tool that any of the abrasive materials, such as emery powder or the like, may be used in case the cylinder is of a metal requiring such materials. It is also apparent that with the spindle rotating in a clockwise direction, in order to move the lapping members 15 farther outwardly it is necessary merely to manually engage the nut 21 momentarily while the spindle is rotating holding it for a very short interval a ainst rotation, whereupon the rod 18 will e moved downwardly a short distance and the lapping members 15 moved outwardly to properly engage the cylinder walls.

The detachable connection of the members '15 to the sections 10 of members 9 is desirable 1n order that lapping members of greater or less thickness may be applied to be used with cylinders of greater or less diameters. For instance in Fig. 4 the same tool is used in connection with a smaller diameter cylinder 23a,

i the only difference being that the thicker lapping members 15 are replaced by narrower ones 15a. The adjustment effected by the tapered head 19 engaging against the ends of the pins 17 is not one to take care of different diameters of cylinders but merely for entering the tool into a cylinder and ad'usting it to fit the inner sides thereof, di erent diameters of cylinders being taken care of by means of di'erent thicknesses of honing or lapping members 15 or 15a.

The construction described, while relatively simple, is very practical and efficient and has so proved in practice. Variations in detail of structure may be resorted to without departing from the invention which is defined in the appended claims and I, accordingly, consider myself entitled to all forms of structure coming within the scope of said claims.

I claim:

1. In a device of the class described, a spindle having an elongated axial opening therein, said spindle having an exteriorly threaded portion adjacent one end of said opening, and a vertical slot through a side thereof by said threaded portion, a plurality of lap carrying members pivotally mounted on and carried by said spindle at the outer sides thereof adjacent said threaded portion, said lap carrying members being mounted to swing about axes one located adjacent an edge of each of said members, a. pin connected to each lap carrying member extending through said spindle to the interior opening therein, a rod having a tapered end located within said spindle adjacent the pins, the inner ends of the pins engagi against said tapered lower end, a nut threa ed onto the threaded portion of said spindle having an annular groove at its inner side and a. member extended from the rod through said slot in the spindle into the groove of said nut.

2. In a construction of the class described,

a vertical spindle having an axial opening.

therein, said spindle having an exteriorly threaded portion and a vertical slot cut through said exteriorly threaded portion to the inner opening, a collar projected outwardly from said spindle at the lower end of the threaded portion, ears extending out- Wardly from the lower end of the spindle, a. plurality of lap carrying members located vertically around the spindle between said collar and ears, means pivotally connecting the lap carrying members adjacent one edge thereof to said collar and ears, a pin extending inwardly from each of said lap carrying members through the spindle to the interior opening thereof, manually operable means mounted on the threaded portion to traverse the same, and means movably mounted within said spindle engaging with said pins at one end and having means at its opposite end passed through said slot to engage with said manually operable means whereby the lap carrying members may be adjusted about their vertical axes with respect to said spindle.

3. In a device of the class described, a

tical spindle having an elongated axial open,- ing therein, said spindle having an lexteriorly threaded portion adjacent the upper end of said opening and a vertical slot through a side thereof through said threaded portion, a plurality of lap carrying members pivot ally mounted on said, spindle at the outer side thereof below `said, threaded portion, said lap carrying members being mounted to Swing about vertical axes, a pin Connected tol each lap carrying member extending through said spindleto the interior opening therein,A

a rod having a tapered lower end located within said spindle above the pins, the inner ends of the pins engaging against said tapered lowerend ofthe rod, a nut threaded onto the threaded portion of said spindle and Vmeans extending through said slot in the said lnut for moving said Spindle and engageable with said rod and A rod by actuation of said nut. Y

In testimony whereof I aiiix my signature.

ARTHUR l BRIGKNER. 

